Jaw crusher



Jan. 19, 1965 F. C. ARCHER ETAL JAW CRUSHER Filed March 1963 v 2 Sheets-Sheet 1 o s g g .5: 5 3 vi 1 gz'y- 1 INVENTOR$ F. C. ARCHER BY! 771 ONAS h LOl/R mt & W Arramveys Jan. 19, 1965 F. c. ARCHER ETAL 3,166,259

JAW CRUSHER Filed March 11, 1963 2 Sheets-Sheet 2 INVENTOR 53 37 F. C. ARCHER g BY TH AS H. LOHR y. x

AfT'oR NEYs United States Patent 3,166,259 JAW CRUSHER Fred Curtis Archer, Whitefish Bay, and Thomas H. Lohr, Harfiord, Wis, assignors to Barber-Greene Company, Aurora, HL, a corporation of Illinois Filed Mar. 11, 1963, Ser. No. 264,448 7 Claims. (Cl. 241219) The present invention relates generally to improvements in jaw crushers, and relates more particularly to the provision of improved devices for adjusting the toggle blocks of jaw crushers.

A primary object of this invention is to provide im proved means for enabling adjustments to be effected in the rockable jaw of a jaw crusher to thereby vary the discharge opening of the crusher in an extremely simple, safe and expeditious manner.

Jaw crushers for reducing rock and similar crushable materials to a desired size have been in widespread use for many years. Such crushers consist generally of a pair of cooperating jaws mounted in a suitable frame, one of the jaws being fixed and the other being driven through an eccentric and being rockably fulcrumed upon a toggle plate which is, in turn, fulcrumed on a toggle block. In such devices, the degree of fineness of the product is varied by adjusting the rocking jaw relative to the stationary jaw through the toggle block to thereby vary the discharge opening between the jaws at the lower extremity of the crushing zone.

In the past, these adjustments in the size of the dis charge chamber have normally been accomplished by a series of rather laborious, time-consuming, manual operations frequently necessitating either the complete removal of the toggle link and replacement of the same by a toggle link of a different size, or manual release of a series of bolts and spring rods to permit movement of the rocking jaw and toggle block for insertion or removal of shims followed by readjustment and tightening operations on the bolts and rods. Although some attempts have heretofore been made to reduce the manual labor normally involved by providing power driven jaw adjustment means in the form of hydraulic jacks, the prior arrangements for coupling the power actuators to the toggle block and for permitting access to the shims for insertion or removal thereof are undesirably complicated and costly and still do not provide for convenient access from the exterior of the crushing machine. I

It is therefore another object of the present invention to provide improved power operable adjustment means for the rockable jaw of a jaw crusher which obviates all of the aforementioned objections and disadvantages of prior devices of this general type.

7 Another object of the invention is to provide an improved jaw crusher wherein adjustments in the toggle block and the movable jaw may be readily effected en tirely from the exterior of the machine with the aid of e a actuator operable by fluid pressure or the like.

A further object of the present invention is to provide an improved adjustment mechanism for the toggle block or beam of a jaw crusher which includes means in the form of clamping screws for positively securing the toggle block and shims in adjusted position while permitting quick and easy access to the shims for adjustment purposes.

Still another object of this invention isto provide an improved swing jaw adjusting device wherein the toggle beam is adjusted with the aid of a hydraulic actuator and, in turn, carries the swing jaw retaining springs and tie rod which move with the toggle beam as adjustments therein are effected. 1

These and other additional objects and advantages of the invention will become apparent from the following detailed description.

A clear conception of the construction and operation of a typical jaw crusher embodying the improvements constituting the invention will be had by referring to the drawings accompanying and forming a part of this specification wherein like reference characters designate the same or similar parts in the several views.

FIG. 1 is an approximately central vertical section through a typical jaw crusher embodying the invention;

FIG. 2 is a rear view of the crusher taken from the back side of the swing jaw with parts being broken away to reveal normally hidden structure;

FIG. 3 is a somewhat enlarged fragmentary and part sectional view taken from one side of the machine at 33 of FIG. 2 and showing one of the hydraulic actuators and toggle beam adjusting devices;

FIG. 4 is a similarly enlarged fragmentary section taken along the somewhat irregular line 4-4 of FIG. 3 immediately above the power actuator and toggle beam and through the shims;

FIG. 5 is a further enlarged fragmentary view of one of the adjusting devices taken from an end of the toggle beam; and

FIG. 6 is a plan view of one of the adjustment shims.

While the invention has been shown and described herein as being especially applicable to the swing jaw of a crusher of a particular type, it is not intended to thereby unnecessarily limit the scope or utility of the improvements by reason of such restricted embodiment; and it is also contemplated that certain specific descriptive terminology used herein shall be given the broadest possible interpretation consistent with the disclosure.

Referring to the drawings, the jaw crusher shown therein as embodying the invention comprises, in general, a main frame 8 having side walls 9 suitably secured thereto in parallel spaced relation to provide a housing for a stationary jaw die 10 and a movable jaw die 11. The stationaryjaw die may be rigidly secured to'the main frame 8 in a suitable manner as by means of bolts 12, and the movable jaw die 11 is normally secured within a recess formed in the face of the swinging jaw frame 13 as by-means of a wedge 14 locked in place by a bolt 15. The swinging jaw frame 13 is suspended at its upper end from an eccentric shaft 16, and a swinging jaw guard 17 may be provided to shield the bearings 18 at the ends of the eccentric shaft if desired. The eccentric 16 is driven in a well-known manner through a grooved sheave 19 and a suitable drive motor, not shown, and the bearings 18 may be greased or pressure lubricated as by means of a pressure lubricating device 20 supplying oil thereto through conduits 21.

Adjacent its lower end, the movable jaw frame 13 is rockably fulcrumed upon a toggle plate 22 extending transversely across the rear of the jaw frame between the crusher side walls 9, the toggle plate 22 in turn being fulcrumed on a toggle beam or block 23. In the improved structure embodying the present invention, the toggle beam 23 is of a length somewhat greater than the width of the housing and has its opposite ends extending through alined elongated openings or slots 24 in the side walls 9, the slots 24 forming adjustment ways within which the toggle beam is guided to difierent positions of adjustment as will hereinafter be more fully described.

To retain the ends of the toggle or toggle plate 22 within its toggle seats 26 and 27 provided at the lower end of the movable jaw frame 13 and at the forward end of the toggle beam 23 respectively, a tension rod and spring assembly is provided. As distinguished from the usual constructions wherein the spring and tie rod assembly is attached between the main frame and the movable jaw, the improved tension rod and spring assembly comprises a tension rod 28 pivotally secured at 29 to the jaw frame 13 and having its opposite end suspended from and carried by the toggle beam 23. As shown in FIGS. 1 and 2, a bracket 29 is secured to the toggle beam 23 as by means of a cap screw 30, and the free end of the tension rod 2% extends through an aperture in the bracket 29 and is provided with a sleeve 31 embraced by a coil spring 32 which is compressed between a pair of washers 33 retained in adjusted position by means of lock nuts 34 at the end of the tension nod 28. Since the spring and tension rod assembly thus provided is carried entirely by the toggle beam and movable jaw, thisassembly moves with the toggle beam 23 and jaw 13 as adjustments are effected and the need for frequent readjustment in the tension is accordingly eliminated. Also, in the present structure, the

rear of the crusher is unobstructed and the crusher may moreover be more readily mounted on its foundation. As shown, a guard in the form of an elongated plate 35, S- shaped in cross-section, extending between and secured at its ends as by welding to the crusher side walls 9 rearwardly of the slots 24 may be provided for the toggle beam 23, and this plate 35 also adds rigidity to the jaw crusher assembly.

As hereinabove indicated, the ends of the toggle beam 23 extend through the slots 24 in the side walls 9, and the position of the toggle beam within the way slots 24 may be adjusted by means of shims 37 placed between the toggle beam and the rearward end of each way slot as shown in FIGS. 3, 4 and 5. To move the heavy toggle beam 23 together with the toggle plate 22 and lower end of the rockable jaw 13 to different positions of adjustment for insertion or removal of the shims 37, an actuator such as a hydraulic ram cylinder 38 is provided at each end of the toggle beam exteriorly of the housing side walls 9, and since the adjustment shims and power devices at both ends of the toggle beam 23 are identical, with the power cylinders being coupled together for simultaneous actuation in a well-known manner, only one end of the toggle beam and its attendant adjustment mechanism has been illustrated in the drawings. However, it should be understood that the other end of the beam 23 is provided with identical structure. 7 7

Referring to FIGS. 3 and 4,=the power actuator 38 shown therein has the cylinder end pivotally secured as at 39 to a brace or bracket member 46* rigidly attached to the crusher frame as between a lower base flange 41 and an inclined reinforcing flange 42 formed on the exterior of the side wall 9. The piston 43 of the hydraulic ram'is, in turn, pivotally secured at 44 in a toggle seat to the rear face of the toggle beam 23. The hydraulic ram 38 is double acting and receives pressure fluid selectively through supply conduits 45, 46 in a well-known manner to thereby selectively extend or retract the piston- The toggle beam 23 may thus be moved with the aid of the hydraulic power mechanism within the way slots 24 to permit insertion or removal of the shims.

To positively lock the toggle beam 23 in its adjusted positions upon insertion of the required number of shims 37, a pair of locking cap screws48, 49 are provided. The cap screw 48 is received in a threaded bore 50 formed in the top or side of the toggle beam 23, and this screw 48 is seatedagainst the rib or flange 42 on the side wall 9 but is slidable, when loosened, within a slot 51 formed in the flange upon movement of the toggle beam to adjusted positions. The'cap screw 49, in turn, isreceived within a threaded bore 52 in the rear face of the toggle beam 23 and is seated against the depending portion 42' of the rigid flange 42. Thus, the cap screw 49 when tightened positively draws the toggle beam 23 against shims 37 while the screw 48 may be tightened to aid in positively locking the toggle beam against displacement, and it is necessary to loosen both the cap screw 49 and the cap screw 48 in order to effect adjustments in the positions of the toggle beam 23 by means of the hydraulic ram 38. I

As shown in FIG. 6, the shims 37 are of U-shape with the slot 53 open along one side so that the shims may be slid laterally into position past the cap screw 49 from the side of the crusher. These shims are, of course, of various widths so that an infinite number of adjustments can be etfected by selecting the proper shims. Also, the depending portion 42 of the rigid flange 42 is p'erferably extended under the lower edge of the side opening 24 as at 42 to thereby afiord rigidity to the structure while pro viding a support for the shims as they are inserted or removed at the end of the toggle beam.

From the foregoing detailed description, it is believed apparent that the improved jaw crusher provides simple and highly effective tension means carried entirely by the movable jaw and toggle beam for maintaining the toggle plate 22 in position under proper tension, and the improved mounting of the tension rod and spring provides a unitary structure which not only enables removal of obstructions at the rear of the crusher but which also facilitates mounting of the crusher While eliminating the need for frequent readjustment. The improved adjustment mechanism at the opposite ends of the toggle beam is readily accessible entirely from the exterior of the housing, and with the hydraulic rams coupled directly with the extending ends of the toggle beam, excessive coupling elements have been eliminated. Also, the adjustment shims are readily accessible from the exterior of the crushing housing and there is no need for separate brackets for supporting the same. The improved locking means for the toggle beam and shims is likewise accessible entirely from the exterior, and. the locking screws 48, 49 positively insure against possible displacement of the toggle beam and shims once an adjustment has been effected. Whenever it is desired to make a readjustment in the position of the toggle beam, it is only necessary to loosen the cap screws 48, '49 and to then move the toggle beam by means of the hydraulic ram for insertion or removal of selected shims after which the toggle beam may be repositioned by the ram and then positively locked in such adjusted position by the locking screws 48, 49. The improved devices have resulted in simplification both with regard to production and assembly of the machines as well as maintenance and readjustments therein which are made in the field.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention. We claim:

1. A jaw crusher comprising, a housing having alined elongated openings forming way slots in the side walls thereof, a movable jaw suspended within said housing, a toggle plate within said housing and rockably supporting the lower end of said jaw, a toggle beam extending across said housing'and projecting through the way slotstherein for rockably supporting said toggle plate, jackactuators operably connected directly between a stationary support and each of the projecting ends of said toggle beam exteriorly of said housing for moving said toggle beam to selected positions of adjustment along the way slots, a plurality of removable shims disposed between and bearing directly against said toggle beam and the end of each of said way slots remote from said actuators, and means coacting with said toggle beam independently of said actuators for locking said toggle beam in adjusted position to a fixed portion of said housing.

2. A jaw. crusher according to claim 1, wherein the locking means for the toggle beam is a clamping screw carried by an outwardly extending flange formed on each side of the housing and received in threaded sockets formed in the respective projecting ends of said toggle beam.

3. A jaw crusher according to claim 1, wherein the locking means for the toggle beam comprisespairs of clamping screws carried by outwardly extending flanges formed on opposite sides of the housing, one of the clamping screws of each pair being received in a threaded socket formed in said toggle beam and extending perpendicular to its plane of movement and the other clamping screw of each pair being received in a threaded socket formed in said toggle beam and extending parallel to its plane of movement.

4. A jaw crusher according to claim 3, wherein the side flanges carrying the clamping screws which extend perpendicular to the plane of movement of the toggle beam are slotted to permit movement of their respective screws with the toggle beam when said screws are loosened.

5. A jaw crusher according to claim 1, wherein the locking means for the toggle beam includes a clamping screw carried by an outwardly extending flange formed on each side of the housing and received in threaded sockets formed in said toggle beam remote from the actuators and extending parallel to the plane of movement of said beam, the removable shims being of U-shape to permit the same to be slidably received in the way slots past said clamping screws.

6. A jaw crusher comprising, a housing having alined elongated openings forming way slots, a movable jaw suspended within said housing, a toggle plate Within said housing and rockably supporting the lower end of said jaw, a toggle beam extending transversely of said housing and into the way slots therein for rockably supporting said toggle plate, jack actuators operably connected between a stationary support and said toggle beam for moving said toggle beam to selected positions of adjustment along the way slots, a plurality of removable shims disposed between and bearing directly against said toggle beam and the end of each of said way slots remote from said actuators, and means coacting with said toggle beam independently of said actuators for locking said toggle beam in adjusted position to afixed portion of said housing.

7. A jaw crusher comprising, a housing having alined elongated openings forming way slots in the side walls thereof, a movable jaw suspended within said housing, a toggle plate within said housing and rockably supporting the lower end of said jaw, a toggle beam extending across said housing and projecting through the way slots therein for rockably supporting said toggle plate, fluid pressure actuators operably connected between a stationary support and each of the projecting ends of said toggle beam exteriorly of said housing for moving said toggle beam to selected positions of adjustment along the way slots, and tension means mounted between and supported entirely by the lower end of said jaw and said toggle beam for maintaining said toggle plate in position, said tension means being carried entirely by and being movable as a unit wtih said toggle beam and movable jaw whenever adjustments are effected in the position of the toggle beam.

References Cited by the Examiner UNITED STATES PATENTS 2,084,188 6/37 Buchanan 241-32 2,566,583 9/51 Shelton 241286 X 2,931,585 4/60 Butler 241--219 FOREIGN PATENTS 774,862 5/57 Great Britain.

ANDREW R. IUHASZ, Primary Examiner.

I. SPENCER OVERHOLSER, Examiner. 

7. A JAW CRUSHER COMPRISING, A HOUSING HAVING ALINED ELONGATED OPENINGS FORMING WAY SLOTS IN THE SIDE WALLS THEREOF, A MOVABLE JAW SUSPENDED WITHIN SAID HOUSING, A TOGGLE PLATE WITHIN SAID HOUSING AND ROCKABLY SUPPORTING THE LOWER END OF SAID JAW, A TOGGLE BEAM EXTENDING ACROSS SAID HOUSING AND PROJECTING THROUGH THE WAY SLOTS THEREIN FOR ROCKABLY SUPPORTING SAID TOGGLE PLATE, FLUID PRESSURE ACTUATORS OPERABLY CONNECTED BETWEEN A STATIONARY SUPPORT AND EACH OF THE PROJECTING ENDS OF SAID TOGGLE BEAM EXTERIORLY OF SAID HOUSING FOR MOVING SAID TOGGLE BEAM TO SELECTED POSITIONS OF ADJUSTMENT ALONG THE WAY SLOTS, AND TENSION MEANS MOUNTED BETWEEN AND SUPPORTED ENTIRELY BY THE LOWER END OF SAID JAW AND SAID TOGGLE BEAM FOR MAINTAINING SAID TOGGLE PLATE IN POSITION, SAID TENSION MEANS BEING CARRIED ENTIRELY BY AND BEING MOVABLE AS A UNIT WITH SAID TOGGLE BEAM AND MOVABLE JAW WHENEVER ADJUSTMENTS ARE EFFECTED IN THE POSITION OF THE TOGGLE BEAM. 